Rubber powder/acrylic acid/montmorillonite high water absorption resin and its synthesis method

A technology of superabsorbent resin and acrylic acid, which is applied in the field of superabsorbent resin, can solve the problems of endangering the earth's ecological environment, deteriorating the natural environment, occupying large land, etc., achieving good economic and environmental benefits, stable and safe reaction, and fast polymerization speed Effect

Inactive Publication Date: 2007-02-14
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These treatment methods not only occupy a large amount of land, but also tend to breed mosquitoes and spread diseases; or worsen the natural environment, destroy vegetation growth, affect human health, and endanger the ecological environment of the earth. Therefore, burial and incineration methods have been strongly opposed by people.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Raw material ratio (all dosages are WT%):

[0065] Acrylic acid content 84.59%

[0066] Rubber powder dosage 10.58%

[0067] 80% neutralization of acrylic

[0068] Cross-linking agent dosage 0.13%

[0069] MMT dosage 4.23%

[0070] The dosage of initiator is 0.47%.

[0071] The rubber powder (RP) was pretreated with concentrated acid for 2 hours, and the acrylic acid (AA) was neutralized to a certain degree of neutralization with alkaline solution. Then add a certain quality of montmorillonite (MMT) and pretreated rubber powder (PRP) into the acrylic acid neutralizing solution, add the initiator and crosslinking agent under the protective atmosphere, shear at high speed, and keep the temperature at 60-80°C React for 3 hours, and dry at 110-130°C to obtain superabsorbent resin. The measured water absorption rate of the product is 834g·g -1 .

Embodiment 2

[0073] Acrylic acid content 86.43%

[0074] Rubber powder dosage 8.64%

[0075] 80% neutralization of acrylic

[0076] Cross-linking agent dosage 0.13%

[0077] MMT dosage 4.23%

[0078] The dosage of initiator is 0.48%.

[0079] The rubber powder (RP) was pretreated with concentrated acid for 2 hours, and the acrylic acid (AA) was neutralized to a certain degree of neutralization with alkaline solution. Then add a certain quality of montmorillonite (MMT) and pretreated rubber powder (PRP) into the acrylic acid neutralizing solution, add the initiator and crosslinking agent under the protective atmosphere, shear at high speed, and keep the temperature at 60-80°C React for 3 hours, and dry at 110-130°C to obtain superabsorbent resin. The measured water absorption rate of the product is 1017g·g -1 .

Embodiment 3

[0081] Acrylic acid content 84.64%

[0082] Rubber powder dosage 10.58%

[0083] 80% neutralization of acrylic

[0084] Cross-linking agent dosage 0.08%

[0085] MMT dosage 4.23%

[0086] The dosage of initiator is 0.47%.

[0087] The rubber powder (RP) was pretreated with concentrated acid for 2 hours, and the acrylic acid (AA) was neutralized to a certain degree of neutralization with alkaline solution. Then add a certain quality of montmorillonite (MMT) and pretreated rubber powder (PRP) into the acrylic acid neutralizing solution, add the initiator and crosslinking agent under the protective atmosphere, shear at high speed, and keep the temperature at 60-80°C React for 3 hours, and dry at 110-130°C to obtain superabsorbent resin. The measured water absorption rate of the product is 986g·g -1 .

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Abstract

The high hydroscopicity rubber / acrylic acid / montmorillonite resin has the material composition of acrylic acid 75-88 wt%, rubber powder 7-20 wt%, cross-linking agent 0.05-0.26 wt%, montmorillonite 2.00-10 wt% and initiator 0.25-0.8 wt%. The preparation process includes the steps of: pre-treating rubber powder with concentrated acid solution, neutralizing acrylic acid, adding montmorillonite and pre-treated rubber powder into neutralized acrylic acid liquid, adding initiator and cross-linking agent in protecting atmosphere, high speed shearing, reaction at constant temperature of 60-80 deg.c, and stoving at 110-130 deg.c to obtain the high hydroscopicity resin. The high hydroscopicity rubber / acrylic acid / montmorillonite resin has deionized water absorbing capacity over 1000 g / g. The present invention may have industrial waste used and has excellent economic and environmental benefit.

Description

technical field [0001] The present invention relates to a superabsorbent resin, in particular to a rubber powder / acrylic acid / montmorillonite superabsorbent resin synthesized from waste rubber powder (WRP for short); and the synthesis of the superabsorbent resin method. Background technique [0002] The research and development of super absorbent resin began in the 1960s. After more than 40 years of development and research, its theoretical basis and application technology have undergone tremendous development. Our country started relatively late. In 1982, superabsorbent resin was synthesized for the first time. It was not until 1988 that the first patent was obtained. There are many types of superabsorbent resins. According to the source, there are three main categories: starch, cellulose and synthetic resin. The performance of these series of products is all good, but the raw materials adopted are all regular chemical raw materials, and the cost is relatively high. At ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F253/00C08F2/44C08K3/34C08L51/04
Inventor 李利刘平生沈健周宁琳章峻魏少华
Owner NANJING NORMAL UNIVERSITY
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